Issue 16, 2022

Room temperature doping of Ln3+ in perovskite nanoparticles: a halide exchange mediated cation exchange approach

Abstract

This study presents a halide exchange mediated cation exchange strategy for a room temperature doping of trivalent lanthanide cations (Ln3+) in cesium lead halide (CsPbX3) nanoparticles (NPs). Post-synthetic addition of LnCl3 [Ln = Nd, Sm, Eu, Tb, Dy, and Yb] to a solution of CsPbBr3 NPs generates the corresponding lanthanide doped NPs which display host sensitized Ln3+ emission. Structural and spectroscopic characterizations indicate a successful halide exchange and substitutional displacement of Pb2+ by Ln3+. The effect of halide identity in controlling the Ln3+ sensitization was also evaluated. A photophysical framework is presented that can be used to predict the Ln3+ sensitization in perovskite NPs semiempirically, thereby removing the constraints of trial and error in designing a perovskite NP-Ln3+ host–guest combination.

Graphical abstract: Room temperature doping of Ln3+ in perovskite nanoparticles: a halide exchange mediated cation exchange approach

Supplementary files

Article information

Article type
Paper
Submitted
25 Jan 2022
Accepted
31 Mac 2022
First published
31 Mac 2022

Nanoscale, 2022,14, 6037-6051

Author version available

Room temperature doping of Ln3+ in perovskite nanoparticles: a halide exchange mediated cation exchange approach

G. H. Debnath, B. P. Bloom, S. Tan and D. H. Waldeck, Nanoscale, 2022, 14, 6037 DOI: 10.1039/D2NR00490A

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